APA

Nascimento U., . (1977). Goniometer for determining the friction angle between particles of granular materials. Lisboa: Laboratorio Nacional de Engenharia Civil. Memoria nr 493.

Chicago

Nascimento U, . 1977. Goniometer for determining the friction angle between particles of granular materials. Lisboa: Laboratorio Nacional de Engenharia Civil. Memoria nr 493.

Harvard

Nascimento U., . (1977). Goniometer for determining the friction angle between particles of granular materials. Lisboa: Laboratorio Nacional de Engenharia Civil. Memoria nr 493.

MLA

Nascimento U, . Goniometer for determining the friction angle between particles of granular materials. Lisboa: Laboratorio Nacional de Engenharia Civil. Memoria nr 493. 1977.